Liner



FRANK LE COGQ AND IBWIN-LE COCQ,.OF ABERDEEN, SOUTH. DAKOTA; SAID FRANKLE COCQ ASSIGNOR TG SAID IRWIN LE COCQ.

LINER Application led February 28, 1922. Serial No. 539,989.

To all whom it may comem:

Be it known that we, FRANK Lr. Coco and IRWIN Lr: Coco, citizens of' theUnited States, and residents of Aberdeen, in the 5 county of Brown andState of South Dakota, have invented certain new and useful Improvementsin Liners, of which the following is a specification.

This invention relates to liners especially adapted for use in deepwells. v

Briefly stated an important object of this invention is to provide awell casing consisting of inner and outer spaced tubes 4between which aquantity of cement or other suitable filling is arranged so that whenthe inner section disintegrates as a result o contact with theimpurities in the products of the well the conduit formed by the fillingof cement will greatly prolong the life ofthe well.

A further object of the invention is to provide novel means whereby theinner and outer sections may be properly spaced so as to provide acement pipe of a uniform thickness throughout.

A further object of the invention is to provide a lining for wells whichis of highly simplified construction, durable in use and cheap tomanufacture.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

ln, the accompanying drawing forming a part of this application and inwhich like 35 numerals are employed to designate` like parts throughoutthe same,

Figure 1 is a. fragmentary vertical sectional view of the improved wellcasing, the view illustrating place.

the cement filling in Figu re 2 is a similar view, the'viewillustratiiigthe means for filling the space between the inner and outer pipes withcement.

Figure 3 is a horizontal sectional view taken on -line 3A-,3 of Figure2.

ln the drawing wherein for the purpose of illustration is shown apreferred embodiment ofthe invention the numerals 5 and 6 generallydesignate inner and outer spaced 5 sections, each of which may consistof a plurality of sections of diiierent diameters. As illustrated inFigure 2 the several sections of .the inner casing are joined bycouplings 8 with which collars 9 may be engaged, said collars beingprovided with radial arms 10 which engage the outer casing v so as tomaintain the outer casing a uniform distance from the inner casing atall times. lt will be seen that the couplings 8 of which there maybe anydesired number not only form a means `for connecting the sec- Ations ofthe 'inner casing but also limit the downward movement of the severalcollars 9.

'lo allow the well to continue to flow after the casing 5 disintegrateswe provide a lining or filling of cement 12 betweenvthe inner and outercasings and the said cement is introduced into the space between thecasings in a fluid state and is allowed to set thereby forming a cementconduit.

lThe cement is introduced into the annular chamber between the casingsby means of a pipe l'which is arranged in the annular chamber and iswithdrawn as the level of the cement rises. The spacing arms 10 serve asa reliable means for maintaining the outer casing 6 a uniform distancefrom the inner casing 5 so that the wall of the intermediate casing isof a uniform thickness throughout.

With reference to the foregoing description taken in connection with theaccom-- result of continued* contact with the iin-` purities in theliquid.

n carrying out the invention the outer casing 6 may vary in size and inthat case sections of dierent sizes are joined by annular securingelements 20 of rubber or other suitable material and by reference toFig. 2 it will be seen that one of the rubber sealing elements 2O formsthe bottom wall of the annular chamber into which the cement isintroduced..

As stated in the matter be inning on line 590i United States Patent1,050,244, Jan. 14, 1913, to Andrew Smith it has been proposed to sealthe annular space between the outer curbing or casing and the bore ofthewell by illing the same with cement forced downwardly from the top. Ifany obstruction occurs in the space surrounding the casing, theflow isstopped, leaving the lower part of the casina` unsealed therebydefeating the purpose of filling the space with cement.

-Having thus described the invention what we claim is l. In an oil Well,the combination of inner and outer spaced casings, a filling of cementbetween the inner and outer casings forming a conduit for use subsequentto the, disintegration of the inner casing as the result of contact withthe impurities in the oil, collars mounted on the inner casing andhaving radial spacing arms engaging the outer casing whereby to maintainthe inner and outer casings in uniform spaced relation throughout,saidinner casing being formed with a plurality of connecting couplingsengaged by said collars and holding the collars in spaced relation.

2. In an oil Well, the combination of inner and outer spaced oasings, afilling of cement between the inner and outer casings 'forming a conduitfor use subsequent to -the disintegration of the inner casing as theresult of contact with the impurities in the oil, collars mounted on theinner casing and having radial spacing arms engaging the outer casingwhereby to maintain the inner and outer casings in uniform spacedrelation throughout, l said inner caslng being'formed with a pluralityof connecting couplings engaged by said collars and holding the collarsin spaced relation, and means whereby to lill the space between theinner and outer 'casings with cement in a liquid state, said meanscomprising a pipe lowered from the surface and adapted to discharge thecement in a liquid state into the space between the inner and outercasings.

FRANK LE CUCQ. IRWIN LE COCQ.

